Improvement in sewing-machines



' zsh -Sh GEORGE L. DULANEY. t5 I2 mprovemen in Sewing-Machines.414,424.

'Patented May 2 /7/25'72 fief UNITED STATES PATENT OEEICE.

GEORGE L. DULANEY, OF NEW YORK, N. Y.

IMPROVEMENT IN SEWING-MACHINES.

Specification forming part of Letters Patent No. 114,424, dated May 2,1871.

.To all fwhom 'it may concern:

Be it known that I, GEORGE L. DULANEY, of the city, county, and State ofNew York, have invented certain Improvements in Sew# ing-Machines; and Ido hereby declare that the following, taken in connection with thedrawing which accompanies and forms part of this specification, is adescription of my invention sufficient to enable those skilled in theart to practice it.

My improvements relate to the means for actuating the shuttle-driver andimparting to it a variable velocity; to the means for imparting avariable velocity to the movement of the needle and regulating the same;to a means for adapting the position of the needle to the pathof theshuttle; to the means for securing the needle to its bar to the meansfor regulating the limit of descent of the needie, and to the take-upfor the needlethread.

Figure 1 is a plan view with the cloth-plate removed, and the main armand needle are broken away. Fig. 2 is a central vertical section. Fig. 3is a horizontal section through the main shaft, and also through the twoin dependent journals and their adjacent parts. Fig. 4 is an elevationof the machine. Figs. 5, 6, 7, and 8 are detail views.

A is the bed-plate or frame; B, the main arm; C, the needle-arm; D, themain shaft; E and F, two independent journals, whose axes are parallelwith, but not in a line with, that of the main shaft.

The arm B is formed with a journ fil-bearing, 1, for the main shaft,which it supports, and it is secured firmly to the bedplate by a bolt,2, for a purpose and Vin a manner hereinafter stated.

G is a disk on one end of the main shaft, having a drivingpulley, 3,cast with it, and having a radial slot, 4, made therein. Into this slotenters a pin, 5, on an arm, 6, secured to the journal E, running in abearing in the bed-plate, as seen.

H is a link or rod connecting the pin 5 with the shuttle-driver I, whichruns on rods or ways i, as shown.

The journal E is placed out of line with, but parallel with, the axis ofthe main shaft, in order that the uniform velocity of the main shaftshall cause the pin 5 at the end of arm 6, as it revolves with the diskat each revolution, to approach and recede from the center of the disk,and thus impart to the rodH a rapid movement when the shuttle passesthrough the loop of needle-thread, its motions at other times being lessrapid.

'Io the other end of the main shaft is secured another disk, K,having'also a radial slot, 7, into which enters a pin, S, on a disk, 9,upon which, at its outer side, is au eccentric, 10, the disk andeccentric being secured to the independent journal F, which runs in abearing on the frame or bed-plate, the aXis of this journal being alsoout of line but parallel with that of the main shaft.

The rear end of the needle-arm C is slotted in yoke form, as seen at 11,and spans the ec centric 10.

It will now be seen that the uniform revolution of the main shaft will,through the instrumentality of the slot and pin 8, impart a movement ofvariable velocity to the needlearm, and consequently to the needle.

A set-screw, 12, permits an adjustment of the disk K to any desiredposition around the main shaft, and consequently the proper regulationor timing of the rapid or slow move ments of the needle relatively tothose of the shuttle.

It will be observed that in addition to the variableness of the needlesmovement, due to the slot and pin, the movement of the eccentric in theyoke also contributes toward imparting a variable motion. When a needleof large size is substituted for a finer one, 0r vice versa, in allsewing-machines, the loop-taking implement, whether a shuttle or looper,is liable to fail in taking the loop of needle-thread, and the result isthe missing of a stitch and imperfect work.

To correct this I provide for adjusting laterally the position of theneedle relatively to the face ofthe race and the path of the shuttle bycausing the main arm to be turned slightly upon its fulcrum bolt orscrew 2.

The' means I have devised for adjusting the position of the arm and ofthe needle and its bar are as follows: A bolt, 13, having a portion, 14,of the same made eccentric, passes through an opening, 15, in' the rearof the bedplate or frame, and the eccentric part enters shaft and itsdisks G and K with the described means for imparting the proper variablemovements both to the shuttle and needle.

4. The main arm secured to the bed-plate by means of a pivotal center,about which it may be adjusted and secured for the purpose of adaptingthe position of the needle to the path of the shuttle, substantiallyv asdescribed.

5. The combination, with the needle-bar and a notched needle, of theeccentric piece or lever 17, operating in the manner shown anddescribed, to hold the needle to place in the bar.

6. The combination, with the needle-arm, of

28h --Sh SAMUEL EAST. s e Improvement in Machines for DressingMillstones- N0.

Patented May 2,1871.

